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    • 3. 发明专利
    • Method and device for determining decompressed volume in pump cylinder
    • 用于确定泵缸中分解体积的方法和装置
    • JP2009162234A
    • 2009-07-23
    • JP2009004068
    • 2009-01-09
    • Teledyne Isco Incテレダイン イズコ、インク.Isco, Inc.
    • ALLINGTON ROBERT WBLAKLEY SCOTT LWALTERS HENRY L
    • F04B49/06F04B1/02F04B9/04F04B11/00G01F11/04G01N30/32G01N30/36
    • F04B1/02F04B11/0058F04B11/0083F04B49/065F04B2203/0209F04B2205/05F04B2205/09G01N30/36G01N2030/326
    • PROBLEM TO BE SOLVED: To provide a new arrangement for synchronizing a gradient generator by making a recompressed volume the same as a recompressed volume of a high pressure pump.
      SOLUTION: A check valve is kept closed at an initial stage of a pumping stroke of a first piston by which fluid is compressed at a finite volumetric elastic module, and a second piston provides all flows at fixed rotation speeds. When pressure in a cylinder of the first piston reaches delivery pressure once, and a delivery check valve opens, a control system is changed over to a constant pressure control mode to maintain a flow rate at a fixed value. When the delivery check valve of the second piston is closed and pump control is returned to fixed rotation speed, constant pressure control is switched off again. Angular displacement making the control mode changeover effective is determined by monitoring delivery pressure, and storing a value of angular displacement at which the first-grade time differential of pressure is remarkably changed.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种通过使再压缩体积与高压泵的再压缩体积相同的梯度发生器同步的新装置。 解决方案:止回阀在第一活塞的泵送冲程的初始阶段保持关闭,第一活塞的流体在有限的体积弹性模块处被压缩,并且第二活塞以固定的转速提供所有流。 当第一活塞的气缸中的压力达到一次输送压力并且释放止回阀打开时,将控制系统切换到恒定压力控制模式以将流量维持在固定值。 当第二活塞的排放止回阀关闭并且泵控制返回到固定的转速时,再次关闭恒压控制。 通过监视输送压力来确定控制模式切换有效的角位移,并且存储压差的一级时间差显着改变的角位移值。 版权所有(C)2009,JPO&INPIT
    • 6. 发明专利
    • High pressure reciprocating pump and its control
    • 高压重油泵及其控制
    • JP2004218635A
    • 2004-08-05
    • JP2003391653
    • 2003-11-21
    • Isco Incイズコ、インク.Isco, Inc.
    • ALLINGTON ROBERT WBLAKLEY SCOTT LWALTERS HENRY L
    • F04B1/02F04B9/04F04B11/00F04B49/06G01N30/32G01N30/36
    • F04B1/02F04B11/0058F04B11/0083F04B49/065F04B2203/0209F04B2205/05F04B2205/09G01N30/36G01N2030/326
    • PROBLEM TO BE SOLVED: To provide a high pressure reciprocating pump having an improved arrangement for synchronizing a gradient generator by making its recompression volume equal to that of a high pressure pump.
      SOLUTION: The high pressure reciprocating pump is structured so that its check valve remains closed in the initial period of the pumping stroke of the first piston in which the fluid is compressed with a finite modulus of elasticity by volume and the second piston shares all flow at a fixed rotating speed. If then the pressure in the cylinder of the first piston once reaches the pressure of exhaustion and a discharge check valve is opened, the control system is changed over into the constant pressure control mode so as to maintain the rate of flow to the fixed value. When the discharge check valve of the second piston is closed and the pump control returns to the fixed rotating speed, the constant pressure control is switched off again. Determination of the angular displacement for making valid the changing-over of the control modes is executed by monitoring the discharge pressure and accommodating the value of angular displacement in which the first-grade time differential of the pressure changes remarkably.
      COPYRIGHT: (C)2004,JPO&NCIPI
    • 要解决的问题:提供一种具有改进的布置的高压往复泵,其通过使其压缩体积等于高压泵的再压缩体积来同步梯度发生器。 解决方案:高压往复泵的结构使得其止回阀在第一活塞的泵送冲程的初始阶段保持关闭,其中流体以有限的弹性体积被压缩而被压缩,第二活塞分配 全部以固定的转速流动。 然后,如果第一活塞的气缸中的压力一旦达到排气压力并且排气止回阀打开,则将控制系统切换到恒压控制模式,以将流量的速率保持在固定值。 当第二活塞的排放止回阀关闭并且泵控制返回到固定转速时,恒压控制再次被切断。 通过监测排出压力并适应压力的一级时间差显着变化的角位移值,来确定用于使控制模式转换有效的角位移。 版权所有(C)2004,JPO&NCIPI